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Details for Benchmark: JU3793

N 39° 31.427 W 075° 38.382 (NAD 83)

Altitude: 0

Coordinates may not be exact. Altitude is UNKNOWN and location is ADJUSTED. (more info)

In NEW CASTLE county, DE View Original Datasheet
Marker Type:
navigation light
setting not listed - see description

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Intersection station identified as described. Mark in good condition. The light is now privately owned. It was erected in 1877 and served as Port Penn Rear Range Lighthouse making it contemporary with the similar appearing Finn's Point Rear Range Light. It was moved here in 1906.

photoThe mark

a little harder to see with the leafy trees

photofound on the way to a cache
photoview through the trees

Spotted from the Hickory Grove Cemetery.


While chauffeuring a few others around grabbing caches we came across this benchmark.


Working the C&D Canal with Jenny_D_Pooh. We are making Forbez and Team T&A redo the trail because that's the way we roll. While in the area we allowed them to pick up a few caches and benchmarks.

Another benchmark we spotted while doing the C&D Canal Trail. We have a few of these down in SJ.

Liston Rear Range Light.
Found while at Hickory Grove Cemetery.

Traditional Bill and I were already nearbt when he noticed this. Nice.

Headed to the canal for the hydro cache and noticed this light house. Looks to be in great shape


Fuzzy and I were doing a nearby cache when I spotted this. We have several of the exact rear range lights back home in South Jersey that are benchmarks. So, I took a couple pictures of this one, just in case. And sure enough, it was!


Found while taking the detour around maintenance work on Del 9 Reedy Point Bridge.

We spotted this on our way to GC3X2GB.
It's easily visible from the road.

photoJU3793 Liston Rear Range Light

Spotted this while doing the C&D canal trail of geocaches.

Recovered in good condition..

Spotted this one while exploring the C&D canal area. Just a short ways down Rt 13 and left on Port Penn rd

Easy and fun find.

Spotted this Light from Route 1 South.

We spotted this Rear Range Light while traveling north on Rt. 1. This light is aligned with the Finn's Point Rear Range light in NJ, which is Benchmark JU3766 and Virtual cache GC8E23. The Liston Light was listed on the National Register of Historic Places in 1978 and it is aligned with 4 other lights (2 in NJ and 2 in DE). The lights were used as an aide in vessel navigation.

Dont understand this navigation light....perhaps for the canal ?
Can spot it from the toll booth area....

Checking maps for this area...see that this may be a nav aide for boating on the delaware river...any locals know about this?

Observed the light. It is a metal column, 10 feet in diameter and about 125 feet in height with six legs. It is painted black all over.

Also found AJ8040 (in NGS database, not in Geocaching database) about 1.9 miles due south of the light. AJ8040, GPS NC 4, is a survey disk located 69 feet south of the centerline of DE Highway 896 and 31 feet west of the centerline of the off ramp from State Route 1 (toll) northbound to DE 896 (Boyd's Corner Road) & DE 420 (Pole Bridge Road), flush with the surface and at published adjusted coordinates (re-formatted) N39-30.026 W075-38.680. The disk is stamped GPS NC-4 2000. This disk is now a Waymark at:

[This entry was edited by seventhings on Monday, September 24, 2007 at 8:43:24 AM.]

photoAJ8040 in New Castle Co., DE
Looking north, it's at the white notebook, center.
photoAJ8040 - the station
photoJU3793 in New Castle Co., DE
Looking west-northwest.

found this one on the way back from little creek

Found the navigation light.


Documented History (by the NGS)

01/01/1933 by CGS (FIRST OBSERVED)
01/01/1975 by NGS (GOOD)
01/01/1984 by NOS (GOOD)
06/12/1991 by USPSQD (GOOD)

Control Text

  • The horizontal coordinates were established by classical geodetic methods and adjusted by the National Geodetic Survey in January 1992.
  • The Laplace correction was computed from DEFLEC99 derived deflections.
  • The geoid height was determined by GEOID99.

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